So what: FleetCor's fourth-quarter results -- EPS of $0.82 on revenue of $202.6 million versus the consensus of $0.75 and $178.7 million -- and full-year outlook were so strong, that analysts have no choice but to raise their valuation estimates, yet again. Management cited continued international expansion, as well as lower wholesale fuel costs for the positive report, giving Wall Street plenty of optimism over profitable growth going forward.

Now what: Management now sees full-year adjusted EPS of $3.61-$3.69, well above Wall Street's view of $3.40. Chairman and CEO Ron Clarke said in a statement:

We are also well positioned to kick off 2013 as we have nearly $1 billion in liquidity to continue our global business development efforts.

Of course, with the stock now up a whopping 85% over just the past six months, and trading at a P/E of around 30, much of that bullishness might already be baked into the valuation.